Journal: Where are the Ubuntu search results?

Recently I searched for the single word "Ubuntu" on google, yahoo, and msn. Here is a breakdown of the number of page results returned:

google: 58,700,000
yahoo: 114,000,000
msn: 191,000

So can I assume that Microsoft actively culls search results with ubuntu in them, since searching for the term "microsoft vista" returns millions of hits on all three search engines?